Rear window protector for truck



FIG. 1 is a perspective view of a hook for rack showing my new design.

FIG. 2 is a front elevational view thereof;

FIG. 3 is a bottom plan view thereof; and,

FIG. 4 is a rear elevational view thereof.

The truck rack is shown in broken lines for illustrative purposes only and forms no part of the claimed design. 

CLAIM The ornamental design for a rear window protector for truck, as shown. 